A sum of money doubles itself in 12 years. In how many years would it treble itself ?

A sum of money doubles itself in 10 yr. In how many years would it triple itself?

A sum of money trebles itself in 15 years 6 months. In how many years would it double itself? (a) 6 years 3 months (b) 7 years 9 months (c) 8 years 3 months (d) 9 years 6 months

A sum of money doubles itself in 7 years. In how many years it will become 4 times ?

A sum of money (P) doubles in 10 years . In how many years is will treble at the same rate of simple interest ?

A sum of money invested at certain rate of interest doubles itself in 10 years. In how much time will it treble itself at the same rate ?

A sum of money invested at a certain rate of interest doubles itself in 8 years. In how much time will it treble itself at the same interest rate ?

A certain sum of money triple itself in 8 years. In how many years it will be five times?